Need some help/advice

I have been having weird discharge for the past like three weeks.. Some days it will be light brown, some days it will be pinkish orangish, and for about two days it was normal (creamy white/clear). I was supposed to start my period 3 days ago and have not, and my last period was very light was very discharge-like. I had sex about 2 months ago, we used a condom and he pulled out before he went. I am not on birth control. I have no idea what it could be. If you have any idea, please reply!!